US Bridges

I 10 EB and WB over Colorado River

Good

La Paz County, Arizona · 18.9 MI W of JCT US 95 · Structure no. 00619

Built
1960
65 years old, rebuilt 1974
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
1,113 ft
5 main spans
Daily traffic
60,000
2016 count
Owner
State
State Highway Agency

About this bridge

I 10 EB and WB over Colorado River is a steel stringer/multi-beam or girder carrying I 10 EB and WB over Colorado River in La Paz County, Arizona. It was built in 1960 and reconstructed in 1974, so it is 65 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 60,000 vehicles a day, roughly 36% of them trucks, projected to reach 74,751 by 2042. The structure is 1,113 ft (339.2 m) long and 104 ft wide. If it were closed, the detour would be 55.9 mi (90 km).

CarriesI 10 EB and WB
CrossesColorado River
Location18.9 MI W of JCT US 95
RouteInterstate 10
StateArizona
Coordinates33.60503, -114.53272
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating38 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans5 (+2 approach)
Design loadHS 20
Structure length1,113 ft (339.2 m)
Longest span246 ft (75 m)
Deck width104 ft (31.6 m)
Roadway width94 ft (28.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60,000 (2016)
Projected traffic74,751 by 2042
Trucks36%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed55.9 mi (90 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$12,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I 10 EB and WB over Colorado River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1974.

What condition is I 10 EB and WB over Colorado River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does I 10 EB and WB over Colorado River carry?

About 60,000 vehicles per day (2016 count), of which roughly 36% are trucks.

How long is I 10 EB and WB over Colorado River?

The structure is 1,113 ft (339.2 m) long with a longest span of 246 ft (75 m) and a deck 104 ft wide.

Who owns I 10 EB and WB over Colorado River?

It is owned by the State Highway Agency.